What module efficiency means
Module efficiency describes how much sunlight a panel converts into electricity under standard test conditions. It is useful when roof area is limited, but it is not the same as the energy a property will receive in practice.
Wattage, temperature and degradation
Panel wattage, temperature behaviour and long-term degradation affect how a system performs. Inverter efficiency, wiring and shading also create differences between rated capacity and delivered energy.
These factors should be considered together rather than reduced to a single ranking.
Fit the equipment to the roof
A panel with suitable dimensions, electrical characteristics and warranty terms may be a better project fit than a higher-efficiency alternative that cannot use the roof effectively.
Solar Picks supports comparison, while Solar System Builder helps carry the discussion into a wider configuration.
See the platform in action.
Explore these SOLARGAGA experiences to understand the workflow described above.